Feature 1、The aquarium thermometer is completely waterproof, you can put it in the fish tank, real‑time monitoring of water temperature 2、Very simple to operate, no instructions necessary, just use the battery, with no buttons to operate. 3、Suction cup for ease of placement , just find the best spot in the fish tank, then attach the unit with the small suction pad which will keep the thermometer in place until removal is required. 4、The temperature range is from 0℃∽+50℃, allowing you to use this aquarium thermometer in the majority of temperature conditions. 5、Aquarium thermometer is an attractive but simple designed unit with no over‑complicated controls. Condition: Item Type: Aquarium Thermometer Material: ABS Plastic Color: As shown in the picture Size: Approx.5.5x4.6cm/2.2x1.8in Measurement Range: 0℃ to +50℃; Resolution: ±0.1℃ Accuracy: ±1℃ Weight: Approx.27g/1oz Battery: 1 x 1.5V button battery(Not included) Application: Suitable for fresh water tank, sea water tank, grass tank and other aquarium. Package List 1 x Aquarium Thermometer Note 1. Please allow 1‑2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly,and make sure you will not mind before ordering.